Bending press



May 13, 1930. 'M H, PMNE 1,758,237

BENDING PRESS Filed Jan. 21, 192s 5 Sheets-sheet 1 5 Sheets-fsheefr,- -2

M. H. PAINE BENDING Pmass Filed Jan'. 21. 1928 f lMay 13, 1930.

May 13,1930. LM H, PAINE 1,758,237

' BENDING PRESS Filed Jan. 2L. 1928 5 Sheets-.Sheet 3 May 13, 1930.

M. H. PAINE 1,758,237

BENDING- Pnsss ,Filed Jag. 21." 1928 '5 sheets-sheet 4 2z' '36, e4 al f4 3j @7 Y rn r May 13, 1930. M. H. PAINE BENDING PRESS Filed Jan. 21. 192B 5 Sheets-Sheet 5 p Patented May 13,i

iti' f FMATHEWVH. rAIN'F., .or GLEN ELLYN, AILLILVToIs 7 This invention reiates'to bending pressesj more especially orormingloops and rings insuch articles asV pipe-hanger bands andthe ing such devices in large .quantities at a low: cost; toA` providefa machine which fcan be readily'alteredorfset up to accommodate differentsizesV and shapes of Workgfandto in construction and reliableyin operation.

tion is shown'in in which:

Figure 1 press.`

the accompanying drawings,

isa plan Vvievvfof the F 2 -is a perspectivefviewof a partiallyl formed pipe han-ger.

` Fig. 3 `is aperspective view of the complete'd hanger as formed on this machine.

lVF ig. 4 is afront elevation of the machine.

Fig. 5 is a rear elevation of the same.

Fig. 7 is a fragmentarysection takenfon the'line 7 7 of Fig. 1. a

Fig. Sis a detailedsection oi thehammer slide, Vtakenon the line 8-"8 of Fig. 17 with the hammer shownin end elevation.y n Fig. 9 isV a 'diagrammaticview' of theopera-ting parts shown in Fig. `1, with a strip of stock in position. f

Fig. 10 is a viewlof the parts shown in Fig.;

9, in changed position. showingthe first step in the Jforming operation. p j. Fig. 11 shows the'ha-nzger partiallyi'ormed.

Fgl 12 SHOWS the completion of the ing-operation.

VVFig. 13 is an enlarged vieiv ofthe hanger stock, as viewed in`Figf4; and

Of Fig; 13.

' base 1,Kthev bearings 5 being integrally formed inthe pedestals 4 for rotatably supporting the cam shaft. The front end of the bolster l sprin `in the. plate 14.1.

3 is supported onthe table 2'1'and`therear end n. fgnideway 'ih the bolster4 byiiieansoffthej gibs provide a machine which is simple andrugged p p v p Y Y thejbolster 3A so thattheupperjsurfaces of the Anillustrative` embodiment of this inven? remediar@ ser mi Suitable @mangueras inv Slides-:l1 @C1112 'are Substantially H'hgvithi the topofthebolster.` I

oo r'dn'g to the. size of A the "'vvorlr. The rear slide member 12 is apertured vto. receive the upper'end of the driving levereo anderswo' through'uslotted holes inthe plates i13 and'14 .and empreinte meenden. rheupperfsue. ace of `the`pla .tel 13 lis provided a chan nel for receivingjthejstoclr gripping plunger 23 Whic'hli's'draivn forwardly kbyme'ans, ofthe? g"231`1which attached'toi the post The Slide 12 is provided .with atransffe,

yoke at the rearend, to which arefatf tached the' contractilesprings 25.,- 'lhe `fronte' .4 ends'` .ofthe springs 25ar'e anchored to postsf Q26 secured'inthe bolster 3,:,to drawthe ram v,and plunger Yiforvx'fardly. For holdingthe' grippingendQf the"plungerv 23from ac'-,`

tualfcontactvvith the mandrel 10, stops'fare?y provided bythe set screws. 28fwhich are adi" iustblifthreadefd into the l end of the..

plungeri23.l

' Onone of'theibolts .22 off Y the plate 14, ispivotally mountedl angular lever 30` Which extends between.stop pins 31,1iXed `in the 'ilunger.2 34 a'ndf`coci'neratesgY with the iixedstop 33, in "the bolster, for" holding the gripping end 27 spaced from the mandrel 10 in the forward position of the ram, -so that the strip of stock Sfcan be inserted behind the mandrel, as shown in Fig, 9.

The forward position of the ram'is positively determinedv by the 'cooperating brackets 34 and 35, the bracket 34;beinggbolted to the rear end ofthe `slide12V and provided with an adjusting screw 36 in thev outer end, which engages with` the bracket l35 which bolted to the bolster 3.1

A pair of hammers 37 'i mounted, oneat'either side ofthe ram, *in

l f ster land project over laterally extending por-,-

V` Y s 0 r hammer is limited byvmeans of the adjust suitable guideways lformed in the transverse portions of the bolster `3,1the hammers being held down by gibV plates "38" Fig.r4,'which are secured tothe nppersurface of the bolable stop 42, Fig. 5, the stopbeingengaged by an abutment" 43 'formed 0n the upperf edge of the ',haminerfV 'llhestop jmemberv42 Vis T-shaped, with the sternfportionV extending betweenithe pair of;` rails 44 whichY are mountedV on posts 45,"whichare Secured at i ieither end of the tablelframeportion12..' The stop member 42 is clamped inposition by `means of the cap screws 46jiwhichithread into -thestemV portion of the stopmemberand clamp,V the plate 47 against tlierupperY edge of the rails 44. For v`moving-the stops 42, suitable lead screws 48 `are .journaled inthe upper ends of thefrposts 45, and Ythread through therespective stops. Inadjusting the stops, the cap 'screws46 are loosenedand. the lead screws 48rotated untilthestops are.

in the proper position, the stops then being locked by tighteningthe setscrews, n l Upo'none end of the! shaft 6, Fig.="4, is

Y loosely mounted'a heavy'driving pulley "50 .which kmay be connected to the .shaft f6Y for a single revolution bymeans of farsuitableY clutch k51 whichis controlled .by Athe pedal 52. `The clutch andthe brake 53 which isk mounted on ythe opposite end ofthe shaftl to prevent overrunning, are of a lconstructionA` which is commonly used-for performing the, v given function and need not be fullydescribed -herein.,-

y a cam 54lvwhich"is rigidly'fmounted onthe shaft The raml operating lever '2OY is piv-` oted at itslower end'in therear pedestal 7 i 'and'is :connected at anfintermediate point -to the cam slide 55 by means of the' pivot-al links 561-fl`helslide 55 is guidedV inthe 'lower end l ofia bracket 57 which depends from the lower Sieg efflibeeef Sand te@ freut @dief the A,mately 18()k degreesjof the turning movementr` lof the shaft6. s

Y bending guides,

shows iIiFie 12- f Thel hammers'i'37and 38 are driven linwardlyby means oflugs60 which are pro-KV vided on the opposite sides of the cam 54.

As thecaln is rotating, the lugs 60 Vpass be l .tweengthe inner ends of the slides 6llwhich are mounted on either side ofthe cam in suit` `able guiding brackets 62, which are secured to the"V under sideof the table Vportion A2. The rear endsof the slides 6l lare connected by yoke's `64l are connected to the rear ends o f 'the ammers`37 and 38 respectivelyy by means ofthe side links 66.

. n'setfnsup the machine@ Suitable 11155. drel lo iSPlaCd Over the post 18. The Vcam isthentnrned to move the slide rl2 toits eX- l i Vtreme rear position. ,rThe lengthofthe ram is then adjusted byy setting the bolts 22,so

that ,the forward edge of the mandrel is be- 'hind'the-rear edges ofthe hammers approxi V slide 55 is providedwithiarroller 58 which Vis engaged bythe peripheral surface of the lcam 54. i

Vsuitable'side links 63 tothe lower ends of the yokes 64;'and theyokes 64 are centrally 'plv'oted on'thepi'ns l65 which are fixed in the lframeportion 2, andthe upper ends ofthe mately the thickness 0f the stock which is to beused. The forward position kof theram is then `v`adj usted by p means of 'the screw 36j so jthat therea'r edge Vof the vmandrel 10 is then infront of the hammers 377and38 a suf- 'i ficientz'distanice to allow easy insertion of the` y strip of stock S. f The stopsv 42 for limiting the retraction of the i hammers 'are ithen"V ad- )usted tok allow for the thickness ofthe stock as the mandrel is .drawn mers.

pedal 52, the wheel;V 5()k being' constantly driven. As soon as the cam has rotated suficiently to engage with the; plunger 55, the,v ram r1s drawn rearwardlyl through approxi- Y As soon'as the end of the lever `3Oleaves mandrel `Inthis Vmanner thestock is `pressed hardagainstthe mandrel so that it cannot slip"during the 'formingV operations. VThe'mandrel isdrawn Y through betweenthe `endsofthe hammers 37 'and 38, the front cor-V` nersY of'ithe hammers serving asvst-ationary the f-bending, the pressure of the plunger;

tends Vto prevent'fthe stock from kinking in 'y ythemiddle asY thestock isb-ent into the U,-

shape, as showngin Fig. 2 and Fig. lil, around themandrel.

`After the mandrel through between l the hammers,thehammers are Vforcibly drivenVV togethery to draw'fand form'- the stockffVV ik ,i

aroundthev mandrel, closing the loop. as,V

as shownin Fig. 10. During j- V110,0 between the ham- In operation, -whenfthe stockis inserted, the press 1s set'inmotion bydepressing the the stop 33,the spring 231 draws the end 27` of the plunger 23 against `thestock on the y against the stop 42by' means of the springs.

' anni The high portions of the cam 54 and lugs 60 then pass by their respective plungers, allowing the hammers to Vbe drawn back 40, the ram being allowed to move forwardly by the receding portion 68 of the periphery of the cam 54. rIhe ram Vis drawn` back` by meansrof the springs until the end ofthe lever again strikes the stopV 33. The

- plunger is then held, 'andfthe'springs 25 draw the ram Completely forward until vthe Vend of the screw 36 strikes againstl the stop member 35. Y Y f Y Considerable pressure on the vhammers is Vrequired in the position shown in-Fijg.'l 12 to form theV loop so that the ends will notspring apart.- Therefore, the respective ends ofthe yolres 3a are formed to bear directly on the ends of thel hammers and plungers 6l. Since n. the lugsrGO are directly opposite each other on thesides of the cam, solid connections are provided by this arrangement for applying the heavy pressure for closing the stock.

From they foregoing, it can be perceived Vthat the feeding andhandling of the Vwork is very simple, and that the machine can' b e operated fast. rIhe machine can be built toj accommodate a large range of rsizes and shapes of work, and can be quickly changedover for accommodating different work.

Although but one specific embodiment ofl lthis invention has been herein shown and Y described,it will be understood that details f of the construction'shown may be altered or .i emitted without departingfrom the spirit of this invention as defined by the, following having a mandrel which is drawn between the hammers when the slide is reciprooated, means for reciprocating the slide, aclpistabie stopsfor limiting the-retraction of thehami mers to adapt thef'same to serve as bending guides to form stock aroundmandrels ofvarious sizes, when one thereof is drawn between the hammers, and means VVfordriving Ace the hammers forwardly behind the mandrel i to form the stock around the mandrel, Vsaid driving means being adapted to predetermine the commencement of the` driving of said hammersto corr-espond lwith the size of the mandrel. Y y f' V- Y' 2. In a bending press, a frame, a ram having a mandrel,tlie ram being slidably mounted in the frame, means for driving the ram, means mounted in the frame 'y for forming stock around the mandrel, a piunger slidably mounted on the ram, a spring attached tothe plunger and anchored to the framefor pressing the plunger toward the mandrel,- aiid a stop mounted on the frame for holdingthe plunger away from the mandrel in the forward position of the ram. l

' its stroke and the v slides to drive the hammers together and lugs adjustably mounted on said frame for pre.-

\ 31 e In.' wending' pf-ea. :firmes am having mandrel, the 'ra-mf, being vslidably @Quilted in the; freine. eplunael: slidably` mounted *onV the ram, meansV for 'positiv'ely'1 l withdrawing the rain,` av spring' attachedfto thelv plunger"andlfanehored to-'fthe frame pressing -j thej plunger against ythevjman'drei' and also `'drawing lthe ram,forwardly', a lever,

pivotaliyfinounted: ontliev rain `:fridf 'c'pnnected'- to the plunger', fanda stopjniiount'edv 'on 'the' `froni'the mandrel." Y

In a bending ypress, a frame, a y' ably mounted' inv4 thefraine, a pair of hammers Cooperating with the ram and slidablymounted one at each side of the ram, a cam Vrotatably'mounted in said frame for withdrawing the-ram, slides mounted in the frame" i aty each iside of the cam and; connected for reverse motionp'toy each` ofthe Vhammers, and lugs fixed on the sides oftheV cam for wedging betweenthe inner ends of the' determining' the commencement ofthe driving of said hammers relative to the 'position vofsaid ram and limiting the'outwardv movementof the hainmerslto a'dapttlie press for forming articlesof'diiferent sizes. V

5 y5. In a-benydingpress, a frame, a ram slid- 1a ably mounted thereon comprising a mandrel,

hammers slidably mountedon said frame on each side of said ram, a cam rotatively mounted in said'frame for withdrawing the ram between the said'hammers,.slides mounted rinV said frame at each side Vofthe cam andv conioo nected for reverse motion'to each hammer, l

vlugs i'ixed on the'sides ofl the cam for wedging between the inner ends of fthe slides to Ldrive said hammers inwardly, adjustable means mounted on Jthe frame for limiting the outwardmovement ofV said hammers to adapt the same for forming stock` on mandrels of dierent sizes, and means for predeterniining the starting position of said ram relative to said hammers, for assuring the occurrence of the driving thereof immediately after the mandrel has passed therebetween.

6. *In a bending press, arani having a mandrel, a pair of hammers, one slidable at each side of the ram, means for limiting the retraction of the hammers for bending ,the

stoclaround the mandrel after the mandrel is drawn between the hammers, said means being adJustable for predetermining thefdistancebetween said hammers to correspond the size of the mandrel, and means for driving the hammers in behind the mandrel toform thesto'ck aroundthe same, said driving means being adapted to predetermine the commencement of the driving of said hammers to correspond with-the size of the mandrel;

`7 bending press Cmprising a frame,

erableby said cam for driving saidhammer fdrwardly behind saidmndreL-said driving;

mechanism being positively Connected with said hammer and adapted tel` predeterminef Y the comiiiieeemeriij of the drvng of said hammer to corre'speiid with igsrstarting. po-

sitiom A Signm at Chieagetllis 19th day f amia1`y51928-2, ,V w MATHEWRPAINE as'y a rarmquntedonjsaid frame; a mandrel on Y said rarnf, ahammer slidably mounted ,on said l Y frame; irmeans forrretracting said hammer.' relative to saidmandrels, al cvamyfr reeipro.

eating said ram, `and driviilginechansm Op. 

